Re: Help with SQL

I don't think the Left Outer Join or Exception join would work, as the JOIN
would be on 4 keys, and the sql would return only the records where the
JOIN is not successful. So it would return only records where there is no
match in child table. Maybe I am wrong, but that is what my test sql did.


On Fri, Dec 20, 2019 at 7:19 AM Rob Berendt <rob@xxxxxxxxx> wrote:

I did a simple google for sql list missing child rows
Basically it boiled down to a few choices between
NOT EXISTS
NOT IN
LEFT OUTER JOIN
EXCEPTION JOIN

Rob Berendt
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-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
Vinay Gavankar
Sent: Friday, December 20, 2019 7:14 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Help with SQL

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Hi,

We have a Table with K1, K2, K3, K4 as Primary keys with about 800 million
records. A child table, which is partitioned, has K1, K2, K3, K4, K5 (Seq
Number) as Primary keys and a Status field (value of A or I) with about 10
billion records. Child table having no record for the 4 keys is possible,
though highly unlikely.

I need to get a list of records (just the key fields) from the main Table,
which has no record in the child table with Status = 'A' (may or may not
have an 'I' Status record).

Can someone please help me with some efficient sql code to achieve this?
TIA.

Vinay
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